中国寄生虫学与寄生虫病杂志 ›› 2020, Vol. 38 ›› Issue (1): 87-94.doi: 10.12140/j.issn.1000-7423.2020.01.013

• 论著 • 上一篇    下一篇

豫皖闽浙4省溪蟹并殖吸虫囊蚴核糖体ITS2和线粒体CO1基因序列分析

胡坤敏, 陈韶红, 艾琳, 郑彬*   

  1. 中国疾病预防控制中心寄生虫病预防控制所,国家热带病研究中心,世界卫生组织热带病合作中心,科技部国家级热带病国际联合研究中心,卫生部寄生虫病原与媒介生物学重点实验室,上海 200025
  • 收稿日期:2019-09-28 出版日期:2020-02-28 发布日期:2020-03-19
  • 通讯作者: 郑彬,E-mail:zhengbin@nipd.chinacdc.cn
  • 作者简介:胡坤敏(1991-),女,硕士研究生,从事寄生虫病检测技术研究。E-mail: 2450433288@qq.com
  • 基金资助:
    国家重大科技专项(No. 2018ZX10734-404)

Sequence analysis of ribosomal ITS2 gene and mitochondrial CO1 gene of Paragonimus metacercariae from freshwater crabs in Henan, Anhui, Fujian and Zhejiang provinces, China

HU Kun-min, CHEN Shao-hong, AI Lin, ZHENG Bin*   

  1. 1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Center of Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China
  • Received:2019-09-28 Online:2020-02-28 Published:2020-03-19
  • Contact: E-mail:zhengbin@nipd.chinacdc.cn
  • Supported by:
    Supported by the National Science and Technology Major Program of China(No. 2018ZX10734-404)

摘要: 目的 分析我国豫皖闽浙4省5地区溪蟹并殖吸虫囊蚴核糖体内转录间隔区2(ITS2)和线粒体细胞色素c氧化酶亚基Ⅰ(CO1)基因序列,鉴定并殖吸虫囊蚴虫种。 方法 2018年10月至2019年9月,于安徽省休宁县蓝田镇、浙江省永嘉县、河南省济源市邵原镇、福建省政和县及漳州市等5个调查点采集溪蟹,分离溪蟹中并殖吸虫,提取囊蚴基因组DNA,PCR扩增核糖体ITS2和线粒体CO1基因,测序。采用DNA Star拼接各基因测序结果,并进行各序列间的比对,同时与GenBankTM中并殖吸虫基因进行BLAST比对。基于ITS2、CO1序列,以肝片吸虫为外群,采用邻接法构建系统进化树。 结果 安徽省休宁县蓝田镇、浙江省永嘉县、河南省济源市邵原镇、福建省政和县及漳州市等5个调查点的溪蟹并殖吸虫囊蚴阳性率分别为82%(49/60)、41%(29/70)、55%(41/74)、65%(41/63)和45%(32/71)。ITS2、CO1扩增长度依次约为500 bp、450 bp。安徽省休宁县蓝田镇和浙江省永嘉县溪蟹并殖吸虫囊蚴ITS2、CO1与卫氏并殖吸虫(KC417492.1,AF219379.2)的相似性最高,分别为99%~100%、96%~99%,均与卫氏并殖吸虫聚为一支;河南省济源市邵原镇溪蟹并殖吸虫囊蚴ITS2、CO1与斯氏并殖吸虫(KX129924.1、MK568551.1)的相似性最高,分别为98%~100%、95%~99%,均与斯氏并殖吸虫聚为一支;福建省政和县溪蟹并殖吸虫囊蚴ITS2与斯氏并殖吸虫(KX129924.1)的相似性最高,为98%~100%,与斯氏、宫崎并殖吸虫聚为一大支(两虫种分支不明显),CO1与宫崎并殖吸虫(AY618823.1、AY618834.1)的相似性最高,为91%~94%,与宫崎并殖吸虫聚为一支,与斯氏并殖吸虫分支明显;福建省漳州市溪蟹并殖吸虫囊蚴ITS2与卫氏并殖吸虫(KC417492.1)的相似性最高,达100%,CO1与三平正并殖吸虫(AF159595.1)的相似性最高,为97%~99%,与三平正并殖吸虫聚为一支。 结论 4省5地区溪蟹并殖吸虫囊蚴PCR扩增检出CO1与卫氏、斯氏、宫崎和三平正并殖吸虫高度同源。并殖吸虫CO1可作为并殖吸虫虫种鉴别的潜在分子标记。

关键词: 并殖吸虫, 囊蚴, 溪蟹, 核糖体内转录间隔区2, 线粒体细胞色素c氧化酶Ⅰ

Abstract: Objective To analyze the sequences of ribosomal second internal transcribed spacer(ITS2) and mitochondrial cytochrome c oxidase subunit Ⅰ (CO1) genes of Paragonimus metacercariae in 5 areas from Henan, Anhui, Fujian and Zhejiang Provinces of China, and identify the species of Paragonimus metacercariae. Methods From October 2018 to September 2019, freshwater crabs were collected from five survey sites, Lantian Town in Xiuning County of Anhui Province, Yongjia County in Zhejiang Province, Shaoyuan Town in Jiyuan City of Henan Province, as well as Zhenghe County and Zhangzhou City in Fujian Province. Genomic DNA was extracted from Paragonimus metacercariae from the crabs, and the ribosomal ITS2 and mitochondrial CO1 genes were amplified by PCR and sequenced. The amplified sequences were spliced and aligned by DNA Star software along with Blast alignment with the Paragonimus genes in GenBankTM. Based on the ITS2 and CO1 gene sequences, a phylogenetic tree was constructed with the neighbor-joining method using Fasciola hepatica as the outgroup. Results The metacercaria positive rates found in the crabs from the five survey sites in Lantian Town, Xiuning County (Anhui Province), Yongjia County (Zhejiang Province), Shaoyuan Town, Jiyuan City (Henan Province), Zhenghe County and Zhangzhou City (Fujian Province) were 82% (49/60), 41% (29/70), 55% (41/74), 65% (41/63), and 45% (32/71), respectively. The lengths of amplified ITS2 and CO1 gene sequences were approximately 500 bp and 450 bp, respectively. The ITS2 and CO1 gene sequences of Paragonimus metacercariae from Lantian Town of Xuning County(Anhui Province) and Yongjia County (Zhejiang Province) showed the highest similarity with those of P. westermani (KC417492.1 and AF219379.2), being 99%-100% and 96%-99%, respectively, and both clustered in the same branch with P. westermani. The ITS2 and CO1 genes of Paragonimus metacercariae from Shaoyuan Town of Jiyuan City(Henan Province) showed the highest similarity with those of P. skrjabini (KX129924.1 and MK568551.1), at 98%-100% and 95%-99%, respectively, both being clustered in the same branch with P. skrjabini. The ITS2 gene of Paragonimus metacercariae from Zhenghe County(Fujian Province) showed the highest similarity (98%-100%) with that of P. skrjabini (KX129924.1), forming a clade with P. skrjabini and P. miyazaki (the distance between the two species was not obvious). The CO1 gene from Zhenghe County showed the highest similarity (91%-94%) with that of P. miyazaki (AY618823.1 and AY618834.1), formed a clade with P. miyazaki but was distant from the clade of P. skrjabini. The ITS2 gene of Paragonimus metacercariae from Zhangzhou City (Fujian Province) showed the highest similarity (100%) with the gene of P. westermani (KC417492.1), and the CO1 gene sequence showed the highest similarity (97%-99%) with that of P. cenococopiosus (AF159595.1), being clustered in the with P. cenococopiosus branch. Conclusion The CO1 gene sequence amplified from the metacercariae of 5 areas in 4 Provinces was highly homologous to those of P. westermani, P. skrjabini, P. miyazaki and P. cenococopiosus. The CO1 gene of Paragonimus may be used as a potential molecular marker for species differentiation.

Key words: Paragonimus, Metacercariae, Freshwater crabs, Ribosomal second internal transcribed spacer, Mitochondrial cytochrome c oxidase subunitⅠ

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